一、前言 埋管的磨损、腐蚀是流化床运行中一个严重问题。目前尚无很有效的解决办法。一般多从材料着手,设法寻求耐磨、耐腐材料,有的甚至采取加厚管壁以延长寿命。此外,还从埋管结构考虑,置埋管成一定倾斜度和设置鳍片。这些措施收到了一定程度的效果,但尚不能根本上解决问题。参照含尘气流冲刷管子时磨损量的一般规律,磨损量δ是下列 I. Introduction Buried wear and corrosion is a serious problem in fluidized bed operation. At present there is no effective solution. Mostly start with the material, trying to find wear-resistant, corrosion-resistant materials, and some even take to thicken the wall to prolong life. In addition, considering the structure of buried pipes, buried pipes have certain inclination and fins. These measures have received a certain degree of effect, but they still can not fundamentally solve the problem. With reference to the general law of wear volume when the air flow scour pipe, the amount of wear δ is as follows